What is font subset embedding?
It would be rare for a document to use all of the characters available in a particular font. To save space in a PDF document the creationware will often only embed the subset of specific characters used in that document. This subset embedding has been said by Lulu staff to be the source of some printing problems with Lulu’s printer. Many PDF creationware packages will insist on subset embedding some fonts in spite of any options you have selected in advance. For instance, Adobe’s Acrobat Distiller 5.0 documentation states specifically that True Type fonts (the fonts generally available on Windows and Mac computers) will always be embedded as subsets.
